Two thing straight away: the joiners on the front mount kit are terrible and with a ko4 you will blow holes in them, take it from somebody that has done it so u will need braided couplets. The pipe work may not fit either as the turbo is in a different place.
With regards to the exhaust kit that decat won't fit as its single cat where the ko4 dowpipe splits in two. Can't see anything else ATM but on phone so can't really zoom in